Furnace.



W. ANDERSON, J. MEIKLE & G. W. FULTON FURNACE.

APPLICATION FILED APR.28.1913.

1,085,001; Patented Jan..20,1914.

- 5 c I WiMesses- "m 2 W conveyer increases PATENT @FFIC.

WILLIAM ANDERSON, OF HELENSBURGH, JAMES MEIKLE, OF GLASGOW, AND CHARLESWILLIAM FULTON, OF PAISLEY. SCOTLAND.

FURNACE.

' Specification of Letters Patent.

' Patented Jan.20,1914c.

Application filed April 28. 1913. Serial No. 764,194.

land; Glasgow, Scotland, and Paisley, Scotland, have invented acertainnew and use ful Improvement in Furnaces, of which the followingis a specification.

This invention relates to furnaces, esp'e steam generators, e. g,

cially furnaces for furnaces for generators of the type having one ormore flues, as described in the specification of our co-pendingapplication filed" Aug-12, 1912, No. 714613. p

The invention consists in a new construction of conveying means forremoving ash.

In the accompanying drawings F igure' 1a is a part elevation, partlongitudinalisection; Fig. 2 is a cross section showing a furnace of thetype referred to fitted with a conveyer embodying the invention.

Referring to the drawings, the fuelsupportcomprises a substantiallyV-shaped grate composed of two series of oppositely inclined bars A forsupporting the fuel and merging at the lower edges of the V into thesldes of an ash-receiving channelor trough B which is open on top andclosed at the bottom and which is disposedlongitudinally of the flue Bof a steam generator. \Vithin said trough or channel B is fitted ahelical conveyer C for removing ashes, which is interrupted at severalpoints along its length, the depth and pitch of the thread beinguniform, the length of the increasing the furnace and the interruptionsbeing of unequal extent, decreasing toward the front of the furnace, sothat the capacity of the progressively in the direction toward thedischarge outlet C thereof. As will be seen, the first convolution ofthe helix commences at the end of the trough remote from the outlet. Itwill be, understood that the rearmost section of the con- -veyer shouldremove only its own quota of ash, 2'. 6., the ash lying immediatelyabove nearer the discharge flights of the screw threads I progressivelytoward the front of the same; the following section i. 6., that outlet Gat the front of the furnace, should convey not only its own quota of ashbut also that delivered by the rearward section thereto, andso on, sothat the capacity of, the conveyer will, in-

crease progressively from the bridge wall to the outlet. ,For crushinglarge pieces of clinker the plain parts of the conveyer (J (21.6., wherethe screw threads are omitted) may be formed with spikes G The conveyerC is made up of short lengths or screw-threaded sections strung on to ashaft of polygonal formation in cross section, one or more distancepieces or nonthreaded sections being interposed to afford theinterruptions abovereferred to. In this way adjustment of the relationof the various flights to that of the intervening nonthreaded sectionsto meet varying requirements, can be readily effected.

What we claim is 1. In'a furnace, the combination of a grate havinginclined sides and an ashreceiving trough into which the inclined side-smerge at their lower edges and which trough is provided at one end witha dis charge outlet, of a rotary conveyer located in said trough andextending from the opposite extremity of said trough to said outlet,said conveyer comprising a shaft of noncircular formation in crosssection, and screw threaded and interposed non-threaded sections strungon said threads being ofuniform depth and pitch, the screw-threadedsections being of. unequal lengths, increasing progressively toward theshaft, the screw discharge outlet, and the non-threaded sections beingof unequal lengths, decreasing toward said outlet.

2.-In a furnace, the combination of a grate having inclined sides and anashreceiving trough into which the inclined sides merge at their loweredges and which trough is provided at one end with a dis charge outlet,of a rotary conveyer located in sai trough and extending from theopposite extremity of said trough to said outlet, said conveyercomprising a shaft of nonn" u 0 n circular formation v 1n cross sect1on,and In testimony whereof we have signed our screw-threaded and mterposednon-threaded names to this speclfication 1n the presence of sectionsstrung on said shaft, the screw two subscribing Witnesses.

threads being of uniform depth and pitch, the screw-threaded sectionsbeingof unequal 3 len ths increasing progressively toward the 1 diszharge outlet, the non-threaded sections CHARLES WILLIAM FULTON being ofunequal lengths, decreasing toward Witnesses said outlet, and belngprovided with radial WALLACE GRANSTON FAIRWEATHER,

10 breaking projections or spikes. i J 01m MCGLEARY.

